MapleMS v2 Download:
Download from Mega
Download from Google Drive
Download from Google Drive 2
Download from Mediafire

Installation Instructions:
1. Extract the ZIP somewhere
2. Run MapleMS 1280x720.exe or MapleMS 800x600.exe
If you don't see the .exe or Data.wz & Data2.wz, your anti-virus removed it.
Either disable your anti-virus, or add the MapleMS folder to the exclusion list before re-extracting.

For more troubleshooting check this thread: